Automatic injection feed appliance for rivets and headed fastenings



Oct. 2, 1951 B. T. HOLTER 2,569,891

AUTOMATIC INJECTION FEED APPLIANCE FOR RIVETS AND HEADED FASTENINGSFiled Oct. 13, 1950 3 Sheets-Sheet 1 LVVENTOR.

Jruc T j'zolfer DRNEYS Oct. 2, 1951 B. T. HOLTER 2,569,891

AUTOMATIC INJECTION FEED APPLIANCE FOR RIVETS AND HEADED FASTENINGSFiled Oct. 13, 1950 3 Sheets-Sheet 2 1 N VEN TOR.

,Brace Tjfo/fer,

21W AT RNEYS Oct. 2, 1951 Filed Oct. 13, 1950 AND HEADED FASTENINGS HOLTAUTOMATIC INJECTION FEED APPLIANCE FOR RIVETS 3 Sheets-Sheet 5 95 Vfire/a9 T ff INVENTOR. oiz er. I

PATENT OFFICE This invention relates-to an automatic injection feedappliancefor feeding rivetsor headed fastenings to openings and'which isadapted to be mountdon a -portable pneumatic riveting tool for supplyingrivets 'to'op'eni'ngs so that the rivets onheaded*fasteningsmaythereafter-be operated upon o'r' 'upsetby the riveting hammer to therebyeliminatethe need for manually inserting the rivet or 'ia'stening byhandor by a separate rivet feeding device and to"*furtherprovide anappliance' to function 'asanattachment for a portable pneumatic rivetinghammer which will great- 1y: facilitate the riveting work and enablerivets to be much more: rapidly 1 applied and set,

Moreparticularly it is an object of the present" invention to provide'anautomatic means by which rivets or headed fastenings may be gravity fedto a barreland pneumatically ejected from the barrel into an openingandwhich may be operated readily in -conjunction with a portable pneumatichammer on which the feeding clevice is alppliedas an attachment toeliminate the manual handling'of the rivets or fastenings.

Another object of theinventionli to provide an attachment for rivetinghammers which is so constructed that the opening into-which the rivet isto beappliedwillnot be obstructed from the view ofthe operator bythehammer or the feeding appliance and wherein the injection tube or barrelmoves forward for injecting the rivet or fasteninginto an opening andthereafter'is automatically retracted out of the way of the peeningelement of the hammer. l a

Still a further-object of the-invention is to provide a 'feedappliancesof extremely simple construction which may be economicallymanufactured and sold, which will beextremely efficient and durable foraccomplishing its intended purpose and ,whereina loaded magazine mayreadily replace an unloaded magazine on the appliance so that the hammerand appliance will not have toremaininoperative while the appliancemagazine is being reloaded.

A further object jofthe invention is to provide a device wherein airpressure is applied to the ejection tube'ofthe appliance through a partof the rivet hammer, utilizing the same air pressure employed to operatethe hammer under the f AU'iioMA'ricINmo'rIoN FEED APPLIANCE v FQRRIVETSAND HEADED FASTENINGS Bruce Holter, Newberry, Pa. f :App li'cationOctober 13, 1950," Serial No. 190,023

' 15 Claims.

Various other objects'and advantages of the invention will hereinafterbecome more fully apparent from the following description of thedrawings, illustrating a"presently preferred embodiment thereof, andwherein: Figure 1 is a side elevational view showing the appliancesecured to and mounted on a conventional pneumatic rivet hammer;

Figure 2 is a fragmentary side elevational view of a portion of thehammer and appliance looking toward the side thereof opposite the sideas seen in Figure 1 Figure 3 is a rear elevational view of the rivet Pfeed and hammer looking from left to right of Figure 1 and with aportion shown in section; Figure 4 is an end elevational view looking inthe opposite direction or from right to left of Figure 1; a

Figure 5 is a fragmentary longitudinal substantially central sectionaview, partly in side eleva tion of a portion of the feed appliance andincluding a portion of the hammer; i

Figure 6 is a vertical sectional view, partly in elevation showing aportion of the appliance taken substantially along a plane as indicatedby the line 65 of Figure 5, and

Figure 7 is a fragmentary horizontal sectional view taken substantiallya ong a plane as indicated by the line 1-1 of Figure 5. A

Referring more specifically to the drawings, the feeding and injectionappliance for rivets and headed fastenings, constituting the invention,is designated generally Ill and for the purpose of illustrating apreferred application and use of the appliance or attachment ID aconventional pneumatic rivet hammer of the portable type is illustratedin the drawings and is designated generally II. The rivet hammer H isgenerally pistol-shaped includin a barrel l2 containing a piston notshown, which is projected from left to right of Figure 1 or toward themuzzle of the barrel l2 by air pressure for projecting a peening elementl3 outwardly of v a the muzzle end of the barrel 12 for upsetting acontrol of an actuating element. disposed to be rivet. Any suitablemeans such as a spring en gaging around the stem of the peening elementI3 and attached to the barrel [2 may be utilized for returning thepeening element to a retracted position, said spring not beingillustrated. The hammer II also includes a handgrip [I4 having athreaded opening l5 (Figure 3) in thebottom thereof for receiving athreaded stem or coupling 16 which is attached to an end of an air hose,H, the opposite end of which hose is adapted to be connected to asource of compressed air, not shown. Above the stem IS a washer is isdisposed in the upper portion of therecess I5 having a radial opening l9communicating 1 with a, passage, not shown, in the handgrip I4 throughwhich the compressed air from the hose I I may pass to a trigger-typevalve 20 which is reciprocally mounted in the handgrip I4 beneath thebarrel l2 and which is adapted to "be displaced inwardly of the handgripto release the air for passage into a cavity 2| of the handgrip which isin communication with the rear end of the barrel l2 to thus supplycompressed air for projecting the piston, not shown, toward the peeningelement 1 3; The parts heretofore described are of conventionalconstruction and have merely been 'briefly described and partiallyillustrated to afford a better understanding of the appliance I9.Further, the power tool II is shown solely for the purpose of moreclearly illustrating (and describing the feeding appliance in andrepresentsonly one of many types of pneumaticpower tools on which theappliance I'D may be mounted and in ;connection with which it may beutilized and it is to be understood that the invention is not intendedto be limited to a pneumatic hammer of the type disclosed in the patentapplication.

;The appliance includes a pair of strap members 22 having outwardlybowed intermediate portions which engage around the enlarged,

rear 'end of the barrel 12, each engaging an op-,

posite side thereof, said strap members having lower terminal portionseach of which is secured to aside of the grip 14 by a screw fastening23; The straps-22 have inwardly offset abutting portions 24 disposedabove the barrel l2 which are secured together by nut and boltfastenings 25. Above the fastenings 25, the portions "24 are bowedoutwardly in opposite directions to provide laterally offset upwardlyextending portions 26 which terminatein 'outturned flanges 2'lconstituting the opposite-ends of the straps 22 and which project awayfrom one another and are disposed in substantially the same plane.Aplate 28 'is supported on and secured 'to' the flanges 27 by flushrivets or similar fastenings 29, as best seen in Figure 6, and saidplate 28 provided with a downturned rear edge portion forming adepending transverse flange '30 which is located behind the strapmembers 22 and which is provided with a downwardly extending slot 3|having a flared substantially semicircular lower portion 32 which opensoutwardly of the bottom edge of the'fiange 30. The upper end of the slot31 which opens outwardly of the upper edge of the plate 28 registerswith a transverse slot 33 in said plate 28 which extends forwardly fromits rear edge and from the depending flange 30. The depending flange 30is provided with enlargements 34 on its forward side, as best seen inFigure 6, which are disposed between the strap portions 26 and whichstraddle the slot 3| and are disposed above the arcuate notch'32, for apurpose which will hereinafter become apparent.

.A switch assembly, designated generally 35 is secured to the flange 30adjacent its bottom edge by nut and bolt 'fa'stenings 36 and is disposedbehind said flange and projects upwardly to above the plate 28. Theswitch assembly 35 is composed of 'a plurality of plates orplies, whichwill hereinafter be described in detail including a rear plate 37, anintermediate ply formed of end sections '38 and 38a, a front ply formedof end sections 39 and 39a and a spacing 'ply 40 interposed between theback plate 31 and the sections 38 and 38a. The parts 37, 38 38a, 39,

7 39a, and '40 are connected'by additional nut and bolt fastenings 41;The front sections 39 and 39a terminate above the level of the plate 28and 4 the front surfaces of the plate sections 38 and 38a are disposedwith their bottom edge portions in abutting engagement with the rearsurface of the flange 30. The back plate 31 is provided with a forwardly'Toifset flange 42 forming an ex tension of its upper edge and whichrises from the assembly 35 adjacent the front face of the spacing plate40, as best seen in Figure 1.

A magazine, designated generally 43 is detachably mounted on {the upperedge of the switch assembly 35 and is composed of a back plate 44, afront plate 45 and an intermediate plate 46 which plates are securedtogether by suitable fastenings E1. 'The "front" plate 45 andintermediate plate 46 are actually formed of sections each extendin fromtop to bottom or end to end of the magazine 43 to form asinuous feedslot for rivets orheaded fastenings, desigrated generally 48 includingan ;,outer,portion Ailformed by the sections of the front plate 45 andwhich is suba stantially narrowerthan the bed portion- 50 of the slot 48and which is. formed by the sections of the intermediate plate lfi.Saidsinuous rivet or headed fastening feed slot 43 extends from theupper to the lower end of the magazine 43 and opens outwardly 'of saidends and is adapted to be filled through 'either'end, preferably theupperend of the slot 48 with rivets or headed fastenings R, asillustrated in Figure 6, the heads of which fit slidably in the bedportion 5!! -of the slot and the shanks or'stems of which extendoutwardly therefrom through the "restricted slot portion i9 which-is-narrower-than the rivet or fastening heads to retain-therivet headsin the slot portion 5!). The, sections defining: the front plate 45 haveoutturned -fianges'49a at their inner edges which define the outer slotportion 7 49; which flanges are disposed on'opposite sides of saidslot'portion '49 and perpendicular, to the front plate 45,forsupportingthe stems 'or shanks of the rivets or headed fasteningsRwhile in engagement'with the feed slot '48 to maintain said shankssubstantially perpendicular "to the plane of the magazine E3 to preventany part of the fastenings from binding in the feed slot 48. Themagazine '43 is provided adjacent each of its ends with a pair of :pins51' whichextend. therethrough and which straddle the "ends" ofthe slot48. Each end of the :rivet slot 48 is adapted to be closed, after saidslot has been filled with rivets :o-r headed fastenings, by a closureplate 52 which detachably engages an-end of the magazine 43 and which isprovided at each end and each side edge with a strap '53 disposedperpendicular to the plate 52 and which straps engage opposite sides ofthe magazine 43 and are'p'r'o vided with notches 54 opening outwardly ofcorresponding side edges thereof to receive the ends of thepins 5|. Itwill thus be seen that each cover plate 52 may be applied against an endof the magazine 43 and'then displaced laterally to engage the strapnotches '54 thereof "with the a'djacent'pins 51 to detachably retain thecover in an applied position. By 'moving the cover 52. in the oppositedirection the notches 54 are disengaged from the pin 5| so that the"cover can be removed. 7 I

The lower end of the magazine 43 rests upon the upper edge of theforward portion of the switch assembly 35 when detachably appliedthereto and in front of the flange 42 and is pro-- 7 vided withopenings, not shown, adjacent its lower edge for receiving headedfastenings 55 which extend forwardly through the fla ge 42 and ment withthe niagazine'to thereby dtactlably' secure the magazine to the flange42.""The fastenings 55 are preferably fixed to the flange 42. The flange42 is provided with upwardly opening notches 51, as best-seen inFlgll1f83f0ff3060fltfandthe strap portions 28. A post88 is fixed toand-rises from the forward end of the sleeve 18 and has an upwardlyprojecting stem 8! which is engaged by an eye member 82 connected to theopposite,- rear.zend 'of the spring 11. A guide rod 83 is fixed "t6 andextends rarwardly from the upper portion of the rear edge of the plate13 and reciprocally engages the intermediate guide bore II for guidingthe ejection tube 84 in its modating corresponding ends of the pins 5|i0 10. reciprocating movement and for preventing said Gated adjace t t ebO edge -fi tube-from turning in the barrel 58. A contractile 43 and itwill be readily apparent-that thebot coil: spring 84* extends looselythrough the upper tom cover 52, not shown, would be removed before b r'12 id b d t t forward d t the magazine is thus attached tothetswitcliflts th'e upper'edge of the plate 13 by a hook member sembly35 and is arily dispo ed- 15 85 and is anchored at its rear end to therear verted position and the switch-assembly inverted while the magazineis being"-connected to the flange42 to prevent the rivets orheadedfasterilings R from escaping through the lower end of: the slot 48after removal of thebottom cover and before the magazine is attachedtothe switch assembly 35.

A tube 58 is disposed longitudinally above the)? barrel I2 and adjacentitsrearend extends be tween the strap portions 26 and is clampedtherein. A-wedge bck 59',-as best seen-in Fig ure-5,-is disposed betweenthe upper portion of the barrel 58 and the plate 28 and may be welded orotherwise suitably secured to said -parts. strap member; designatedgenerally 88 has an intermediate portion 8| clamped aroundthe barrel 58,adjacent its forwarde'nd-by fastenings B 2 which extend I throughabuttin portions of the strap 88 which extend downwardly from the'barrel 58. The terminal portions of; the strap 80- :are bowed outwardlyto provide clampportions 63 which are clamped aroundthe'barrel l2- by"the fastenings 82 and an additional fastening 82a which engages thetermirials of the strap be- 'neath the barrel I2. The barrel or tube 58is thus rigidly supportedabove the barrel- I 2 -and-provides a guide foran ejection tube-0r barrel-84,-therear end of which is reciprocallydisposed inthe barrel 58 and the forward end of which-extends from theforward end of said barrel and terminates in-an ejection head or no-zzle85- having. four circumferentiallyspaced forwardly extending springfingers or strips'GB terminating in tapered converging free ends8'I,=-for a purpose which will hereinafter become apparent.

-A bracket 88 is fixed to and-rises fromnthe barrel 58 behindandadjacent thestrapportion BI and supports a guide 89 which is preferablyformed integral with the bracket 88 and which is disposed above theforward" end of the barrel 58 and over a part of the barrel 84 which isdisposed in advance of the barrel 58. The guide 69 ispositionedlongitudinally of the barrel 58 and includes threelongitudinally disposed hores,- which extend longitudinallytherethrough, as best seen in Figure 5, including. a lower bores") anintermediate bore II and an upper bore 12. A plate I3 rises fromthebarrel or tubetkand; is secured thereto by a sleeverportion I4 whichis clamped around the barrel 64 forwardly of the barrel 58. The plate 13is disposed longitudinally of the barrel 84 and has-aflange "-projectingtransversely from one side thereof. An arm 18 is formed integral withand extends rearwardly' from the rear upright edge of the plate I3toward the bottom bore in. one eridpfacoi'ltractile p n 1 is nc red tothe -arm I8 by afa'steh in'g la and 'zitends rearwardly" therefromloosely through the bore 'lfl'. AISBQQVGEJIQ: is slidablyi mounted onthe barrel 58l5tween the bracket 88' portion OfthUgllldG 89 by a hook86. "On'the right-hand side of the applianceya seen in'Figure l, aslotted bar 81 is supportedat its forward'e'nd on thearm I8 by thefastening 209 I8 and extends rearwardly therefrom along the right-handside of the'guide 89. A fastening in-- eluding a boltshank 88'extendstransversely from the right-hand side of the guide 89 and slidablyengages the slot ofthe bar 81 to form a stop for'limiting-the forwardmovement of the tube and the plate 13 which is fixed thereto.

A diagonal brace 89 is secured at its lower, forward end to "a steppedrear portion 90 onthe" guide 88;whichis disposed below the upper boreI2; as" seen in Figure 5, and extends upwardly andrearwardlytherefromandhas an apertured opposite end 9'I'which abuts against the front sideofthe magazine 43 intermediate of its upper and lower ends and'whic'h"is detachably secured 3'53 thereto by a headed pin 92,'corresponding tothe zontal plane. 'The"le ver"98 is pivotednear one cludes -anuprightplate portion I83, as bestseen ififFigure fliwhich is'di'sposed betweenthe rrtnr plats '39an'd"39a and the spacer plate 48 for" tea versereciprocating movement between the at stop plates stand-738a,? "r eplate rimmer its ofjthe rivet carrier I02 is provided with a rela re rgwsrwvsi n s t s .est inl from top tofbottom thereof and which is atiallitends outwardly beneath the adjacent portions .of the bottom edgesof thefront-plates 58 and-58a and which slidably engages on plate 28 and'hasone end moveable into and out ofabutting engagement with the stop plate94. The plate portion I85 is provided with a slot I55 which extendsrearwardly from adjacent its forward edge and which opens at its rearend into the recess I84 but which is substantially narrower than saidrecess 34 and of substantially the same width as, the slot, 48a. Theopposite end of the link 9'? ispivotally connected by'a pivot member I8? to the end of the plate portion I whichis located adjacent the stop,plate 94. 'The barrel 58 and tubeii4 are provided with elongatedsubstantially T-shaped openings I 08, as best seen in Figure 5, whichregister with the slots 3i and 33 and with the space between theenlargements 34. The plate I85 is normally retained by the spring 84, aswill hereinafter become apparent, in its positionof Figures 5, 6 and 7in which position its slot I55 is inregistry with the slot 83 and out ofregistry with the slot 49a so that a portion of the plate 585 willnormally close the lower endof the slot 49a,,as. best seen in Figure 6.Likewise when the carrier.

I82 is thus disposed the sleeves l5 and I88 are in their retractedpositions of Figure 5 with, the

sleeve I88 disposed behind the registering barrel A nozzle H8 is securedin the rear end of the barrel 58 behind the rear end of the tube 54 andbehind the restrictor I59 and is connected to and communicates with theoutlet end'of an air supply pipe III. which extends downwardly therefromand is connected at its opposite end to the outer 'end of a valve casingH2. The valve-casing H2 is closed at each end thereof and fits into arearwardly opening recess H3 of the hammer II, as best seen in Figurefiand is connected thereto by a threaded connection H4. As best seen inFigures 3 and 5, a supply pipe H5 is disposed in the cored out boreportion H of the pneumatic hammer H and has its upper end secured to andopening into the chamber of the valve housing H2. Said supply pipe H5has its lower end flared as seen at. H5111 Figure 3 and fitting in theupper end of the recess I5 and against the lower end of an annularlyrestricted portion Illa through which the pipe H5 extends. An annularsealing gasket or washer IIl isdisposed in'the recess I5 between theflange H6 and the washer I8. A valve body I I8 is slidably mounted inthe housing H2 and is urged toward the outer end thereof by an expansionspring I I9, one end of which abutsagainst the inner end of the housingH2 and is supported in a centered position by a stem I28 which extendsfrom said inner end of the housing and the opposite end of the, springH9 fits into and abuts against the valve H8 which is cup-shaped andopens toward the stem I28. A valve stem I2I ex.- tends from the oppositeside of the'valve H8 through a stop sleeve I22 and outwardly through anopening in the outer end I23 of the housing H2, which end may bedetachably connected in any suitable manner to the remainder. of saidhousing. The valvestem I2I is provided with'a thumb plate or disk I24 atits outer end. The

I stop'sleeve' I22'is'of a length to permit the spring 48 by gravity sothat the bottom'three rivets will- H9 to movethe valve H8 to the leftonly vto its position of Figure 5 in which position. it is disposed toclose the end of the supply tube H5 tion to insure that the tube 64 andvalve 58 will 8 be correctly disposed so that their openings I88 willfully register.

Assuming that a'loacled magazine'43 isdemountably supported as a part ofthe device In by the fastening means 55, 56 and 92, 83 and thattheparts'are in their normal positions as illustrated in Figures 1, 2and 5 to '7, the rivets R, will feed downwardly in the magazine feedslot pass downwardly from the feed slot 48 by gravity into the switchassembly 35.

forms an extension of the restricted slot portion 49. The carrier orswitch plate I will be normally disposed as illustrated in Figure 6 toclose the lower end of the slot 49a to support the lowermost rivet R andthe rivets disposed thereabove. To operate the rivet or headed fasteningfeeding appliance II! in conjunction with the hammer I I, the hammergrip I4 is grasped in the right hand and the operator then gripsthe'fiange 5 with the fingers of the left hand and pushes outwardly toproject the ejection tube 64 toward an opening into which arivet is tobe fed. The recessed upper left-hand corner of the magazine 43, asillustrated in Figure 3 and designated I21 will afiord the operator anunobstructed view of the nozzle 65 and the opening into which a rivet isto be inserted, not shown, so that as the tube 54 is projectedforwardly, as just previously described, .the right hand may be utilizedto guide the appliance I0 so that the spring fingers 86, 51 may beinserted into the rivet opening when the tube 64 has been moved to afully projected position. This forward displacement of the tube 64through the barrel 58 will be against the action of the spring whichwill be expanded and the tube will be guided in its travel by the barrel58 and the guide rod 83 which slidably engages the bore 1 I. As theplate I3 moves forward with the tube 64 the spring 11 will likewiseinitially expand and will thereafter exert a sufficient pull on the stem8| to displace the sleeve I9 forwardly until it abuts or substantiallyabuts the rear end of the bracket 68 and at which time the stop fasten-.

lever 96 to swing clockwise as seen in Figure '7.

This will cause'the link 9'! and the carrier or switch unit I82 to moveaway. from the stop plate 84 and until the carrier portion I83 contactsand is stopped by engagement with the stop plate 88a at which time theslot I86 will be in registry with the slot 49a to accommodate the stemof the bottom rivet, R whichthen; drops downwardly into The heads of therivets R which enter the switch assembly 35 .will i theslot I06 and intoapposition resting on the plate 28. The tube 64 and parts fixed'theretoare then permitted to return to their positions of Figures 1 and 5 byretraction of the spring 84;

however,.instead oipermitting the tube 64 to ac- 5 are instead actuallydisplaced forwardly as the tube slides rearwardly inthe barrel 58. Asthis occurs, the spring 11 rapidly goes solid and thereafter exerts apush againstthe stem 8| to force the sleeve 19 back to its position ofFigure 5 as When this occurs, the carrier or switch unit I52 moves backto its position of -Figure fito-close the lower end of the, slot 49a andso that the slot )8 will register withthe slots 3 l and 33 to allow therivet which is then engaging the slot 106 to drop through the slots 33and 3] and through the registerin'g openings I08 into a position in thebarrel or tube 64 as illustrated in Figure 5. The operation justpreviously described would then be repeated to feed a rivet from thetube 64 if there were no'rivet previously in said tube or the rivetpreviously inthe tube ,would have been applied while the tube 64 was inan extended position in l a mannernow to be described.

Assuming'that the tube 64 is in an extended position and with thefingers 66, 6'! in an opening into which a'rivet is to be iedgthe thumbof the hand gripping the hammer portion I4 is pressed against the buttonI24 to displace the valve H8 inwardly against the spring H9 to uncoverthe tube H5 so that compressed air supplied through the hose l1 may passthrough the valve housing H2 and pipe III to the nozzle Hi].

This compressed air Will pass under pressure through the restrictorl09to propel the rivet R through the 40 tube 64 and outwardly throughthe spring fingers 66 into the opening engaged by said spring fingers.In order to prevent escape of the air through the registering openingsI08, the sleeve I00 is connected by the rod I01 to the sleeve 19 so thatwhen said sleeve is displaced forwardly or from left to right of Figures1 and 5, as previously described, the sleeve IUD will move over and fclose the openings )8 until the rivet R has been ejected and when thetube 64 is returned to its retracted position of Figure 5 by the spring84 the sleeve I00 willalso assume its'position of Figure 5 to expose theopenings Hill. The enlargement I26 engages the notches I25 as the tube64 reaches its fully retracted position to insure,

complete registration of the openings I08. It will also be obvious thatanother rivet will have been fed intothe carrierplate slot I06 while thetube 64 was projected for applying the rivet and this rivet will thendrop into the tube 64 as said tube is retracted to its position ofFigure 5, so that each time that a rivet is fed and applied andthe tubethereafter retracted, another rivet will be fed into said tube-64.

It will be obvious that a supply of magazines 43 may be maintainedloaded with rivets having stems of different sizes so that a magazinemay be at any time removed from the appliance l0 and replaced with afully loaded magazine having rivets or, headed fastenings of the same ordiffer- Q ent size and without the appliance! 0 being renderedinoperative during a reloadingperiod. 'Various modifications and changesare contemplated and may obyiously be resorted to, without departingfrom the spirit or scope of the inven- 1 ,tion as hereinafter defined bythe appended 'tachably fastened to a pneumatic impact tool forsupporting the guide barrel above the impact tool, an ejection tubereciprocally mounted in the guide ,barrel having a forward endterminating in an outlet extending forwardly from a forward end of: theguide barrel, a switch assembly secured to "one of saidsupportingmembers and disposed the tube 64 reaches a fully retracted position.

above the: guide barrel adjacent its opposite, rear end, amagazinehaving a lower end detachably 'conne'cted'to and supported on saidswitch assembly, said magazine having a rivet or headed fastening slotextending from top to bottom thereof and opening outwardly of its upperand .lower ends'adapted to be filled with rivets or headed fasteningsfed downwardly through said magazine'slot by gravity, said switchassembly including a front plate having 'an upright slot communicating.with a portion of the magazine slot for receiving stems of headedfastenings or 'rivets fed downwardly by gravity from the magazine, acarrier reciprocally mounted in the switch assembly for movementtransversely of thegu'ide barrel and having an upright portion provided.witha recess to accommodate the heads of the rivets or fastenings thestems of which engage the slot of the switch assembly front plate, saidcarrier :having a horizontal plate .portion normally closing the bottomof said front plate slot and including a slot normally disposed out ofregistry therewith, said ejection tube and guide barrel barrelandconnected to said tube, link and lever 'meanseonnecti'ngsaid slideand carrier for reciprocatingthe carrier transversely of the barrel asthe ejection tube is reciprocated longitudinally therein for moving theslot of the horizontal carrier portion into and out of registry with thefront plate slot of the switch assembly and the T- shaped openings ofthe barrel and tube for feeding the rivets or headed fasteningsone-by-one from the front plate slot to theejection tube, anair nozzlemounted in the rear end of the guide bar- -relfor directing air underpressure through the ejection tube toward its outlet end from a pointbehind said T-shaped openings for propelling a rivet or headed fasteningthrough the ejection tube and outwardly of its outlet end, a conduitfor-supplying air under pressure to said nozzle having an outlet endconnected to the nozzle and an inlet end adapted to be connected to anair pressure conduit of the pneumatic impact tool,

and a manually op'ened normally clos'edvalve interposed in said airpressure conduit.

2. A feeding'device as in claim 1, said valve being disposed adjacentthe handgripportion of the pneumatic impact tool to be operated by thethumb of the hand gripping and supporting the tool and feeding "device.r 3. A feeding device as in claim 1, and a handle member secured totheejection tube -forw'ardly not the guide barrel. adapted to bemanually operated for displacing the ejection tube outwardly of theguide barrel into a position for directing a rivet or headed fasteningfromthe outlet end of the ejectiontube into a ri-vet opening and forremoving the carrier to a position to align the slot of its horizontalportion with the front plate slot of the switch assembly for receivingthe stem of a rivet therein by gravity feed.

4. A feeding device as in claim 1, and a handle member secured to theejection tube forwardly of the guide barrel adapted to be manuallyoperated for displacing the ejection tube outwardly of the guide barre1into a position for directing a rivet or headed fastening from theoutlet end of the ejectiontube into a rivet opening and for moving thecarrier to a position to align the slot of its horizontalmportion withthe front plate slot of. the switch assemblyfor receiving the stem of arivet therein by gravity feed, and contractile spring means forreturning the ejection tube to a retracted position in the guide barreland for a rivet or headed fastening from the outlet end .of the ejectiontube into a rivet opening and for moving the carrier to a'position toalign the slot of its horizontal portion with the front plate slot ofthe switch assembly for receiving the stem of a rivet therein by'gravityfeed, a guide member secured to the guide barrel having a bore disposedparallel to the axis of said guide barrel,

7 a rod fixed to said handle and reciprocally enremoved before themagazine is connected'to the switch assembly. 1

11. A feeding device as in claim 1, and a diagonal brace having one endrigidly secured to the guide barrel and an opposite end provided withfastening means detachably connecting the brace to the magazineintermediate of its upper and lower ends.

12. A feeding device as in claim 1, and a restrictor fixed in theejector tube behind the T-shaped opening thereof'to prevent the rivetsor headed fastenings sliding rearwardly from the ejector tube into theguide-barrel. V V r 7 1B. A feeding device as in claim 1, and a hail--dle member secured to the ejection tube forwardly of the guide barreladapted to be manually operated for displacing the ejection tubeoutwardly of the guide barrel into a position for directing a rivet orheaded fastening from'the outlet end of the ejection tube into a rivetopening and for moving the carrier to a position to align the slot ofits horizontal portion with the front plate slot of the switchassembly-for receiving the stem of a rivet therein by gravity feed, anda contractile spring connecting the handle and link and lever meansand-forming a gaging'in said bore and retaining the ejection tubeagainst rotation relatively to the guide barrelto maintain the T-shapedopenings in full registration when the ejection tube is in a fullyretracted position.

6. A'feeding device as in claim 1, and a fastening or rivet dischargenozzle mounted on the outlet end of the ejection tube including aplurality of outwardly projecting spring fingers having inwardlyconverging free ends through which a rivet or headed fastening isadapted to be ejected from theejection tube and guided by said springfingers into a rivet opening.

7. A feeding device as in claim 1, and guide means including a partfixed to the guide barrel and a part fixed to the ejection tube, saidguide means part having inter-engaging relationship for guiding'the tubein its reciprocating movement in the barrel to position the T-shapedopening of the tube in full registration with the T-shaped opening ofthe barrel when the tube is in a fully retracted position.

8. A feeding appliance as in claim 1, and a closure sleeve reciprocallymounted on the guide barrel and connected to said slide and moveablefrom a position behind the T-shaped opening of the guide barrel into aposition for closing said opening to prevent the escape ofair therefromwhen, the tube is moved forwardly to a projected rivetdischargingposition.

9. A feeding device as in claim 1, said rivet or headed fastening feedslot of the magazine being of a sinuous shape and including an innerhead receiving portion. of a greater width than the outer, stemreceiving portion thereof.

10. A feeding device as in claim 1, and closure members detachablymounted on the ends of the magazine for closing the open ends of itsfeed slots, the closure member on the lower end of a :loaded magazinebeing adapted to be resilient connection between-the slide and ejectiontube. I r

14. A feeding device as in claim 1, and stop members forming a part ofthe switch assembly limiting the sliding movement of the carrier toposition the slot of the carrier in registration with the T-shapedopenings at one extremity of movementof the carrier and in registrationwith the front plate slot of the switch assembly at the other extremityof movement of the carrier.

15. A fastener feeding and applying device-for.

use with a portable pneumatic impacttool, comprising a guide barrelmeans adapted to detachably mount the guide barrel on a pneumatic impacttool and longitudinally thereof, an ejection tube reciprocally mountedin the guide barrel having an outlet end extending from a forward endofthe guide barrel,v a switch assembly supported by said means above andtransversely of the guide barrel adjacent its opposite, rear end, amagazine detachably connected to the switch assembly and supportedthereabove in an upright position, said magazine having a rivet orheaded fastening slot opening outwardly of its lower end adapted to befilled with rivets or headed fastenings to be fed therefrom by gravityto the switch assembly, said guide barrel and ejection tube having rivetor headed fastening receiving openings adjacent theirrear ends disposedin registration when the ejection tube is in a retracted position, saidopenings being laterally offset relatively to' the lower end of themagazine slot, a carrier reciprocally mounted in the switch assembly formovement transversely of the guide barrel between a position beneath theoutlet end of the magazine slot and above said T-shaped openings forconveying rivets or headed fastenings one by one from the magazine tothe ejection tube, and link and lever means connecting the ejection tubeand carrier for reciprocating the carrier transverse to the guide barrelas the ejection tube is reciprocated longitudinally in the guide barrelfor feeding the rivets or headed fastenings one by one to the ejectiontube.

BRUCE T. HOLTER;

No references cited.

